Brake for spinning and twisting spindles



June 16, 1964 J. J. KEYSER BRAKE FOR SPINNING AND TWISTING SPINDLES 2 Sheets-Sheet 1 Filed Aug. 20, 1962 mum/rap r ljqnn 32) TTQYSQP June 16, 1964 J. J. KEYSER BRAKE FOR SPINNING AND TWISTING SPINDLES 2 Sheets-Sheet 2 Filed Aug. 20, 1962 F/G 4a United States Patent 3,137,118 BRAKE FOR SPWNING AND TWISTING SPINDLES I Johann Jacob Keyser, Grahenallee 16, Aarau, Switzerland FiledAug. 20, 1962, Ser. No. 217,789 Claims priority, application Germany Aug. 23, 1961 14 Claims. (Cl. 5788) The present invention relates to a brake for spinning and twisting spindles in which the lower whorl edge is provided with a'brake shoe adapted to engage an inner surface and located radially opposite another brake shoe adapted to engage an outer surface, while the adjust merit of both brake shoes toward the whorl surface is effected simultaneously bymeans of an actuating lever tiltable about a vertical pivot.

It is an object of the present invention to improve and simplify a brake of the above-mentioned type without affecting the braking effect.

It is a further object of this invention to provide a brake for spinning and twisting spindles as set forth above which will have simplified actuating means to simplify and facilitate the operation of the brake.

" It is still another object of this invention to provide a' brake for spinning and twisting spindles, which will guard against accidental contact with the whorl or the driving band therefor.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings,

in which:

FIGURE 1 illustrates partly in view and partly in section a portion of a spindle with a brake according to the invention;' FIGURE 1a is a section along the line Ia-Ia of FIG- 'URE 1;

FIGURE lb a section along the line IlgIb of FIG-:

FIGURE 2 illustrates partly in view and partly in section a spindle with a modified brake according to the FIGURE 4 illustrates, similar to FIGURE 3, still.

another modification of a brake according to the invention;

f FIGURE 4a is a section taken along the line IVa-lVai 55 The present invention is characterized pr marily in that,

the vertical pivot has its upper end provided with a head.

of FIGURE 4.

in which the brake shoes are formed directly by means of a slot passing through the central axis of the head and receiving a portion of a skirt connected to the whorl.

In this way, the twobrake shoes together with the pivot form a single integral element to which the actuating lever is connected. g p

With spindles which are not intended for very high speeds, and which do not carry very heavy yarn bodies,

instead of two brake shoes laterally of said slot, one of these brake shoes only is provided.

A brake according to the present invention may be employed with all customary spinning or twisting spindles.

In this connection, it is merely necessary that the center ofthe vertical pivot is below the medium diameter of the P... ce

marginal portion of the whorl where the brake shoe is intended to engage, While it is immaterial whether the pivot is journalled in a flange fixedly connected to the spindle bearing housing or in a flange detachably connected to said housing or whether the pivot is journalled in the spindle rail itself. At any rate, according to the present invention, the vertical pivot is secured in its position in axial direction by at least one spring element engaging the circumference of said pivot.

A further feature of the invention consists in that the pivot portion belowthe head is provided with at least one a similarly designed brake may be employed in which,

tangential surface, preferably with two parallel tangential surfaces, which are designed either as' surface to be engaged by a spring element intended for holding the brake shoes in neutral or ineffective position and/or said tan: gential surface or surfaces may be designed as follower surface for the actuating lever. In this connection, the spring element may be designed as a ring extending around the spindle bearing housing and having its freeends crossing each other while being parallel to each other and bent so that they rest against surfaces of the pivot. If desired, the spring element may at the same time serve as means for securing the spindle bearing housing in axial direction thereof. By thus securing the position of the vertical pivot of the brake and the position of a smooth spindle. bearing housing in axialdirection theerof, a considerable simplification has ben obtained which makes itself favorably felt when producing the individual parts mentioned instance no extensions, spindle nuts or other holding elements are necessary upon which lint could collect.

A further feature of the invention consists in that the actuating lever is designed as tilting lever in such a way that at the outer end of the tiltable part of the actuating lever there is connected a transverse lever extending in horizontal direction. toward both sides. The arrangement may be such that the tilting lever is arranged above, or at the level of, or below the spindle rail on the pivot.

The above-mentioned design of the actuating lever as tilting lever greatly facilitates the actuation of the actuating lever inasmuch as it may be actuated by the knee, the lower leg, or afoot of the operator Without running the risk that the actuating leverof the adjacent brake will be effected, as may be the case when a narrow'spindle division and tilting levers are provided. Thearrangement may be such that at least one spring element is provided on .the tilting lever which element will secure or hold the brake shoes in their neutral or ineffective position. 1

If desired, the brake shoe effective from the outside may be provided with an upward extension extending over the range of the whorl surface. Such an extension will provide an eifective protection against accidental contact with the whorl or the driving belt of a running spindle.

Referring now to the drawings in detail, all embodiments of the invention illustrated in said drawings have in common that the spindle comprises a spindle bearing housing 1 and a spindle shank 2 journalled therein while the spindle bearing housing 1 is connected to the spindle rail 3. Mounted on the spindle shank 2 is the whorl portion 4 the lower end portion 5 of which forms a skirt and serves as braking surface. V

More specifically referring to FIG. 1, the spindle bearskirt 5 there is arranged apivot 11 for the brake. In

conformity with the present invention, this vertical pivot 11 has its upper end provided with a head 12. Head 12 has a slot 13 passing through its longitudind axis so that both sides of said slot 13 brake shoes 14 and 15 are:

formed. As is particularly clearly shown in FIGS. 1 and 1a, whorl skirt extends into slot 13 so that brake shoe 14 is adapted by means of its edges to engage skirt 5 from the outside, while brake shoe is similarly adapted by means of its edges to engage skirt 5 from the inside. With the embodiment illustrated in FIG. 1, an actuating lever 16 is connected to head 12. Lever 16 may be shifted to either side, as is indicated in FIG. 1 by the double arrow A.

As will be seen from FIGS. 1, 1a and 1b, actuation of the actuating lever 16 causes simultaneously both the outer brake shoe 14 and the inner brake shoe 15 or, more spe-' cifically, the edges thereof to engage skirt 5 from the outside and inside respectively, to thereby exert a braking effect on whorl 4. Pivot 11 is below head 12 provided with two parallel tangentially extending surfaces 17 and 17' which in the illustrated embodiment serve as engaging surfaces for a spring element 18. Spring element 18 is designed as a ring embracing spindle bearing housing 1 and having its free ends crossing over each other and ending -in parallel portions so as to form legs 18' and 18" (see in particular FIG. 1b) which rest against the surfaces 17 and 17' respectively of the pivot 11. In this way, pivot 11 may be secured in its position in axial direction and at the same time also the brake shoes may be secured in their neutral or ineffective postion.

The embodiment illustrated in FIGS. 2 and 2a has the same basic construction as set forth in connection with the description of FIG. 1. The arrangement of FIGS. 2 and 2a differs from that of FIG. 1 in that the tangential surfaces 17 and 17 extend over the entire length of pivot 11 below the head 12. In this way, it will be possible, below head 12 and resting on the surface of flange 6, to provide a follower plate 21 as a tiltable portion of the actuating lever. At the outer end of plate 21 there is provided a transverse lever 21 extending toward both sides and carrying the actuating lever proper in form of a tiltable lever 22. In this way, lever 22 will be above the spindle rail 3 and protrudes beyond the front end face of the spindle rail so that the actuation of lever 22can easily be effected with any part of the leg.

A further difference between the arrangement of FIG. 2 and the arrangement of FIG. 1 consists in the extension 23 of the FIG. 2 arrangement. This extension 23 is a continuation or extension of the outer brake shoe 14' and extends over the range of the surface of whorl 4. This affords a protection against accidental contact with the spindle in the range of the whorl. I

Referring now to the embodiment of FIGS. 3 and 3a, this embodiment differs from that of FIGS. 1 and 2 in that the spindle bearing housing 1 has a smooth and extension-free shape and is directly mounted on the spindle rail 3. Pivot 11 with its brake shoes 14 and 15 formed on head 12 extends, in this instance, through the spindle rail 3 and is provided With two tangential surfaces 17 and 17' which extend over the entire length of pivot 11. The actuating lever is also in this instance designed as a tiltable lever 31 which is arranged at the level of the spindle rail 3 in such a way that an upper follower plate 32 and a lower follower plate 33 respectively arrangedabove and below the spindle rail 3 are positively connected to the pivot 11. With this embodiment, the brake shoes 14 and 15 are held in their neutral or ineffective position by a special spring element 34 which is connected to the in-' 1 location of the spindle bearing housing 1 in axial direction thereof and also secure the position of pivot 11.

The embodiment of FIGS. 4 and 4a also has a smooth and extension-free spindle bearing housing I mounted directly on the spindle rail 3. The pivot 11 extends through spindle rail 3 and has a head 12 which, instead of two brake shoes arranged laterally of a slot, as disclosed in FIGS. 1 to '3, has only one brake shoe 41 which is adapted to be effective from the inside. That end of pivot 11 which protrudes beyond the bottom side of spindle rail 3 is also in this instance provided with two tangential surfaces 17 and 17. Between head 12 and the a top side of spindle rail 3 there is provided a spring disc spring disc on one hand, and by the spring element 18 scope of the appended claims.

on the other hand, the position of the spindle bearing housing 1 in its axial direction will be secured on spindle rail 3, and at the same time also the position of pivot 11 and the neutral or inactive position of the brake shoe 41, will be secured. Below the free ends 18 and 18" resting against pivot 11. and pertaining to spring element 18, an actuating or tilting lever 43 is arranged on pivot 11 so that it will be located below the spindle rail 3.

It is, of course, to be understood that instead of providing a brake shoe 41 etfective from the inside only, also a brake shoe effectivefrom the outside only could be employed.

The embodiments illustrated in the drawings and described above clearly indicate that the present invention may be employed with various types of spindles if a corresponding change of individual elements is effected. Accordingly, the present invention is, by no means, limited to the particular constructions shown in the drawings, but also comprises any modifications within the Thus, if desired, the adjustment of the two brake shoes may be effected by a plierelike adjusting means.

What I claim is:

i 1. In a spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation substantially parallel to the axis of rotation of said spindle and comprising a head having a cutout so as to form at least one brake shoe; said pivot being turnable selectively from an ineffective position in which said brake shoe is spaced from said skirt to an elfective position in which said brake shoe has an edge portion thereof infrictional engagement with said skirt for braking'same, and vice versa; and bearing means arranged belowsaid skirt and rotatably journalling said pivot. I

2. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot havingits axis of rotation substantially parallel. to the axis of rotation of said spindle and comprising a head having a slot therethrough arranged along a circular path coaxially with said skirt and receiving therein with play a portion of said skirt to allow free movement of said skirt in said slot; saidhead being divided by said slot into two oppositely located brake shoes straddling said skirt; said pivot being turnable selectively from an ineffective position in which said brake shoes straddle said skirt with play to an effective position in which said brake shoes have edged portions thereof frictionally engage said skirt for braking same, and vice versa; bearing means arranged below said skirt and rotatably journalling said pivot; and means for preventing axial movement of said pivot relative to said skirt.

3. A spindle arrangement according to claim 1, which comprises a single brake shoe only having a curved surface facing said skirt.

4. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; -a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation substantially parallel to the axis of rotation of said spindle and comprising a head shaped to form at least one brake shoe; said pivot being turnable selectively from an ineffective position in which said brake shoe is spaced from said skirt to an effective position in which said brake shoe has an edge portion thereof in frictional engagement with said skirt for braking same, and vice versa; bearing means arranged below said skirt and rotatably journalling said pivot; means for preventing axial movement of said pivot relative to said skirt, and spring means engaging a peripheral portion of said pivot and continuously urging the same from its effective into said ineffective position when said brake shoe is in its effective position.

5. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation thereof substantially parallel to, the axis of rotation of said spindle; the upper end of said pivot means having a head provided with a cutout so as to form at least one shoe for selective engagement and disengagement of an edge portion thereof with said skirt; said shank below said head being provided with at least one tangential surface; said pivot being turnable selectively from an ineffective position in which said brake shoe is spaced from said skirt to an effective position in which said brake shoe has an edge portion thereof in frictional engagement with said skirt for braking same, and vice versa; spring means engaging said tangential surface in the ineffective position of said pivot; bearing means arranged below said skirt and rotatably journalling said pivot; and means for preventing axial movement of said pivot relative to said skirt.

6. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a 1 shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation thereof substantially parallel to the axis of rotation of said spindle;

the upper end of said pivot means having a head recessed so as to form at least one brake shoe for selective engagement and disengagement of an edge portion thereof with said skirt; said shank below said head being pro: vided with at least one tangential peripheral surface; shift lever means engaging said pivot means at said tangential surface thereof for selectively turning, said pivot; said pivot being turnable selectively from an ineffective position in' which said brake shoe is spaced from said skirt'to an effective position in which said brake shoe has an edge portion thereof is in frictional engagement with said skirt for braking same, and vice versa; spring means engaging said tangential surface in the ineffective position of said pivot; bearing means arranged below said skirt and rotatably journalling said pivot; and means for preventing axial movement of said pivot relative to said skirt.

7. An arrangement according to claim 5, which comprises housing means having said spindle journalled therein, and in which said spring means comprises a ring portion extending around said housing means and having leg portions crossing each other for engagement with the tangential surface equipped periphery of said pivot in the ineffective position of said pivot.

8. -A spindle arrangement for-spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; turnable pivot means having the axis of rotation substantially parallel to the axis of rotation of said spindle;

the upper end of said pivot having a head recessed so as v to form brake shoe means for selective engagement and disengagement of an edge portion thereof with said skirt; said shank below said head being provided with at least one tangential peripheral surface; said pivot being turnable selectively from an ineffective position in which said brake shoe means is spaced from said skirt to an effective position in which said brakeshoe means has an edge portion thereof in frictional engagement with said skirt for braking same, and vice versa; spring means engaging said tangential surface in the ineffective position of said pivot; said spring means also including means for preventing axial movement of said pivot relative to said skirt; and bearing means arranged below said skirt and rotatably journalling said pivot.

9. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation substantially parallel to the axis of rotation of said spindle and comprising a head recessed so as to form brake shoe means;

lever means connected to said pivot and including a transverse lever portion and arranged transverse to the axis of said spindle; said transverse lever portion being movable in a horizontal plane for turning said pivot about its longitudinal axis; said pivot being turnable selectively from an ineffective position in which said brake shoe means and said skirt are spaced from each other to an effective position in which said brake shoe means has an edge portion thereof in frictional engagement with said skir for braking same, and vice versa; bearing means arranged below said skirt and rotatably journalling said pivot means; and means for preventing axial movement of said pivot relative to said skirt.

10. An arrangement according to claim 9, which includes a spindle rail supporting said spindle arrangement, and in which said lever means is arranged above said spindle rail.

11. An arrangement according to claim 9; which includes a spindle rail supporting said spindle arrangement, and in which said lever means is arranged at the level of said spindle rail.

12. An arrangement according to claim 9, which includes a spindle rail supporting said spindle arrangement, and in which said lever means is arranged below said spindle rail.

13. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation substantially parallel to the axis of rotation of said spindle and comprising a head recessed so as to form brake shoe means; lever means connected to said pivot and including a transverse lever portion and arranged transverse to the axis of said spindle; said transverse lever portion being movable in a horizontal plane for turning said pivot about its longitudinal axis; said pivot being turnable selectively from an ineffective position in which said brake shoe means is spaced from said skirt to an effective position in which said brake shoe means has an edge portion thereof in frictional engagement with said skirt for braking same, and vice versa; bearing means arranged below said skirt and rotatably journalling said pivot; means for preventing axial movement of said pivot means relative to said skirt; and spring means mounted on said lever means and operable to hold said pivot in its ineffective position.

14. A spindle arrangement for spinning and twisting spindles, which comprises: a rotatable spindle having a shank; a rotatable whorl connected to said shank for rotating said spindle; said whorl having an annular skirt; a turnable pivot having its axis of rotation substantially parallel to the axis of rotation of said spindle and comprising a head having a slot therethrough arranged along a circular path coaxially with said skirt to allow free movement of said skirt in said slot; said head being divided by said slot into two oppositely located brake shoes straddling said skirt; said pivot being turnable selectively from an ineiTective position in which said brake shoes straddle said skirt with play to an efiective position in which said brake shoes have edge portions thereof frictionally engage said skirt for braking same, and vice versa; the outer one of said brake shoes extending up- V 8 Wardly. in front of said whorl and in spaced relationship thereto; bearing means arranged below said skirt and rotatably journalling said pivot; and means for preventing axial movement of said'pivot relative to said skirt.

References Cited in the file of this patent UNITED STATES PATENTS 2,770,092 Wood Nov. 13, 1956 2,966,025 Grundler Dec. 27, 1960 3,019,589 Keyser Feb. 6, 1962 3,063,230 Tetreault -s. Nov. 13, 1962 FOREIGN PATENTS 622,885 Great Britain May 9, 1949 

1. IN A SPINDLE ARRANGEMENT FOR SPINNING AND TWISTING SPINDLES, WHICH COMPRISES: A ROTATABLE SPINDLE HAVING A SHANK; A ROTATABLE WHORL CONNECTED TO SAID SHANK FOR ROTATING SAID SPINDLE; SAID WHORL HAVING AN ANNULAR SKIRT; A TURNABLE PIVOT HAVING ITS AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THE AXIS OF ROTATION OF SAID SPINDLE AND COMPRISING A HEAD HAVING A CUTOUT SO AS TO FORM AT LEAST ONE BRAKE SHOE; SAID PIVOT BEING TURNABLE SELECTIVELY FROM AN 